Automatic contact-making device for an electric circuit.



R. C. HARRIS.

AUTOMATIC CONTACT MAKING DEVICE FOR AN ELECTRIC CIRCUIT.

APPLICATION FILED JULY 27. I917.

1,283,748. Patented Nov. 5, 1918.

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ROBERT C. HARRIS, 01? INDIANAPOLIS, INDIANA.

AUTOMATIC CONTACT-MAKING DEVICE FOR AN ELECTRIC CIRCUIT.

Specification of Letters Patent.

Patented Nov. 5, 1918.

Application filed July 27, 1917. Serial No. 183,167.

I '0 all whom it may concern:

Be it known that I, ROBERT C. HARRIs, a citizen of the United States,residing at 50 Campbell Av., Indiana olis, in the county of Marion andState 0 Indiana, have invented an Automatic Contact-Making Device for anElectric Circuit to be Used in Railroad-Signaling.

This invention relates to an automatic contact making device foroperatin signals. The idea is to use a separate insu ated circuit ofWires, instead of the present unreliable track circuit used in railroadsignalmg.

The device is fastened to the outer edge of a T rail of a railroadtrack. When a train passes over this device, the wheels come in contactwith the device, causing the disk to swing. Durin the swing of this diskthe circuit is close The action of this mechanism is shown in theaccompanying drawing: Figure 1 is a vertical view of the device. Fig. 2is a horizontal view and Fig. 3 shows the action of the mechanism.

No. 1 is a binding post upon the disk, No. 2 is an insulated bindingpost upon the lever No. 6. No. 5 is an axle, fastened to an outsidesupport, upon which the disk swings. No. 4:. is a pin, fastened to anoutside support, which serves the double purpose of controllin thedegree of the swing of the disk and o breaking the contact betweenbindin post No. 2 on the lever and contact pin 0. 3 on the disk.

Fig. 3 shows the position of the disk when contact is made betweenbinding post No. 2 and contact pin No. 3.

Claim:

An automatic contact making device, comprising an axle, an elongateddisk revolving upon the axle; a pivot mounted on said disk; an insulatedlever, revolving upon said pivot upon said disk; a binding post for anelectric circuit upon said disk; an insulated binding post for anelectric circuit upon said lever; a pin fastened to an outside support,said pin working in a slot in the disk, said pin controlling themovement of said disk and staying the lever on said disk so that contactbetween bindin post on said lever and contact pin on sai disk is broken,when the disk is not moved from its position by an outside force.

ROBT. C. HARRIS.

copies of this patent may be obtained for five cents each, by addressingthe Commissioner of intents, Washington, D. G."

